2wires to altenator

literally blowing my mind right now. After replacing altenator because i got it tested and the voltage regulator tested bad. Been having idle problems and though i finally found what was wrong. HARD NO. With the 2 wire disconnected it idles and runs perfect, with it connected it will not idle. Just dies just as before. Any thoughts?
 
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Which 2 wire disconnected? Do you mean the connector to the regulator? What is the voltage at battery and/or alternator when disconnected and when connected?